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'94 940t starts fine ...dies at stop or turn (part 2) 900 1994

posted by  Andrew in AL on  Tue May 21 17:13 CST 2013
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last visit: Fri Oct 24 06:17 CST 2014
[RELATED]

I am reposting hoping for some help. I am not near a good shop, so it is up to me.


94 940t
All this was after correcting a bad radiator, changing out tranny fluid.
http://www.brickboard.com/RWD/volvo/1565712/940/960/980/V90/S90/94_940t_starts_fine_dies_stop_turn.html

Bad CPS replaced. It was working (as worn as it was), but coolant spray from a worn heater hose wet the back firewall area making it give probs.

Tried a CPS I had removed from a 240. This may have been a mistake. It tried to work, but would not.

New proper CPS installed ...all worked well initially. Car started easily, ran good.

Then the probs started.

Super hard to start, at times smells like it is flooding. Once running it was doing good ...

TILL
The wife drove it today. It all started off OK. It was hard to start, but did run good most of the day ..
THEN ..
She started home (about 15 miles out). It alternated between running ok and cutting in and out ...like it would go dead,

She made it home, but I need some help ...please.

:(


--
"Do you think that's air you're breathing now'? (The Matrix 1999) '89 764 (retired), '94 940T (319K), 92 245 (207K)








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    '94 940t starts fine ...dies at stop or turn (part 2) 900 1994

    uid 18083's pic
    posted by  lucid on  Tue May 21 19:14 CST 2013
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    last visit: Fri Oct 24 12:31 CST 2014
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    "Super hard to start, at times smells like it is flooding."

    It might well be flooding. If the Ignition Amplifier is failing to trigger the coil there will be no/poor/intermittent spark. Yet the FI system, working as it should, will still be injecting fuel as usual.

    Search on 940T Ignition Amplifier


    --
    Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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      Found it. 900 1994

      posted by  Andrew in AL on  Tue May 21 21:11 CST 2013
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      last visit: Fri Oct 24 06:17 CST 2014
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      I was checking through the suggestions, and something told me to check the distributor, so I pulled it.

      Years back I had a 91 940 stop dead in the road. I was pretty green then in the world of RWD bricks, so I had it towed to a local shop.

      Got it back with a nice bill. He replaced the distributor and rotor; showed me the old one with carbon tracks that had formed under the black plastic cover, causing the problem.

      Well, this one had carbon tracks, but it also was burnt slap up. The center contact in the cap was gone ...nothing but a hole there.

      Had an extra Bosch cap and rotor, so we are back in business. Running good now, so hopefully it was the bad CPS, some spraying water, and the perfect storm of events that caused the cap to fail ..or maybe it was just age. I don't think I have ever changed it in well over 150K miles.

      It has 370K now ...shooting for 500K. Oh ..still has the original turbo. :)

      Thanks guys!

      --
      "Do you think that's air you're breathing now'? (The Matrix 1999) '89 764 (retired), '94 940T (319K), 92 245 (207K)








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    '94 940t starts fine ...dies at stop or turn (part 2) 900 1994

    posted by  spook on  Tue May 21 18:51 CST 2013
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    last visit: Fri Oct 24 08:06 CST 2014
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    Dear Andrew in AL,

    Hope you're well. How many miles? Are the fuel pumps the factory-original items? A '94 turbo will have an in-tank pre-pump, and a main pump on the underbody, about under the driver's seat.

    Another possibility is that the fuel pump relay (blue, cube, front row on the central relay panel, behind the front center console ashtray) or the fuel injection relay (engine bay, behind the headlight on the driver's side [I think] on a turbo]). These relays, if they start to fail, can produce intermittency.

    Finally, the fuel pressure regulator may have failed. To check this, pull the rubber hose on the front (radiator side) of the regulator. The hose should be dry. If there's fuel in the hose, the regulator has failed.

    Hope this helps.

    Yours faithfully,

    Spook







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